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Ram raises torque to 865 lb-ft

by David Zatz on

Ram is kicking off the 2015 model year early and with extra torque; the 2015 Ram 2500 and 3500 Heavy Duty diesel pickups will increase its torque rating to 865 lb. ft., with Ram 3500 increasing its payload to 7,390 pounds.

Cummins and Ram worked together on a “more aggressive fuel delivery and turbo boost calibration” to push an extra 15 lb-ft of torque out of the 6.7-liter straight-6 diesel. Adding more fuel boosted torque, while adding boost helped horsepower.

2015 Ram heavy duty trucks

The new pickups will maintain their class-leading maximum tow rating of 30,000 pounds, backed by SAE J2807 testing criteria. Ram is the only maker of three-quarter and one-ton pickups to use the SAE standard testing system.

Unlike its domestic competitors, Ram does not remove its spare tire, radio, console, or bumper to bolster its payload figures. Ram claims to have the greatest towing, payload, and power in the segment.

The Ram 3500 pickup with the 6.4 liter Hemi V8 engine gained 100 pounds in its gross vehicle weight, which rose to 13,800 pounds. Ram found that the truck easily passed SAE tests, and re-tested with a higher payload, still passing.

2015 Ram Transmission Horsepower Torque
5.7 Hemi 66RFE six-speed automatic 383 @ 5,600 400 @ 4,000
6.4 Hemi Six-speed automatic 410 @ 5,600 429 @ 4,000
6.7 Diesel Six-speed manual 350 @ 2,800 660 @ 1,400
6.7 Diesel 68RFE six-speed automatic 370 @ 2,800 800 @ 1,600
6.7 Diesel Aisin AS69RC six-speed auto 385 @ 2,800 865 @ 1,700

There are actually three versions of the Cummins diesel engine, calibrated to match the limits of their transmissions — including the only remaining manual heavy-duty-pickup transmission in America.

The Ram 3500 continues to use a rear Hotchkiss leaf spring system, but will, with late availability, have a supplemental air suspension system which allowed softer leaf springs — allowing for more unladed suspension movement, even with a 30,000-lb. trailer.

To smooth the ride, the Ram 2500 uses a segment-exclusive five-link coil rear suspension system. Loaded or unloaded, Ram (and many auto reviewers) claim that the 5-link coil system provides best-in-class ride and handling. The five-link coil design incorporates support at all major points of force, resisting unwanted axle rotation, and providing better lateral support than leaf springs.  The Ram 2500 has an optional rear air suspension for load leveling.

In the front, the Ram Heavy Duty line features an advanced three-link front suspension to ensure roll stiffness. Greater roll stiffness, also known as body roll, is an important characteristic in taller vehicles and especially trucks with heavy payloads. Roll stiffness is measured by the amount the truck’s body tips side-to-side, independently of the wheels, during cornering.

The high capacities of the Ram trucks are based on high-strength 50,000 psi steel frames, with eight cross-members, hydroformed main rails, and fully boxed rear rails.  Center frame rail sections are roll-formed for consistent strength in less complex longitudinal sections. The rear structure includes a factory-installed rear axle cross-member with provisions for fifth wheel and gooseneck hitches.

Ram HD pickups have a standard Class 5 receiver hitch with four- and seven-pin connectors on the bumper. A rear camera backup system with dynamic imaging is optional with the 8.4-inch display, and towers can opt for a cargo-view camera for easier connection to fifth wheel or gooseneck trailers, or to monitor bed loads.

Ram heavy duty trucks have a five year/100,000 mile powertrain warranty, extended oil change interval (15,000 miles on diesels), the largest brakes in the segment, and a diesel exhaust brake. The full truck is covered by a five year, 36,000 mile warranty.

For much more information and more photos, see our 2014-2015 Ram Heavy Duty Pickup page.

David Zatz founded Allpar in 1998 (based on a site he had begun in 1993-94), after years of writing reviews for retail trades. He has been quoted by the New York Times, the Daily Telegraph, the Detroit News, and USA Today. Before making Allpar a full-time career, he was a consultant in organizational psychology. You can reach him by using our contact form (much preferred) or by calling (313) 766-2304


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